PIC18F24 MICROCHIP [Microchip Technology], PIC18F24 Datasheet - Page 297

• Manufacturer Part Number: PIC18F24
• Description: 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

BTG
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
 2004 Microchip Technology Inc.
Q Cycle Activity:
Before Instruction:
After Instruction:
Decode
PORTC =
PORTC =
Q1
Bit Toggle f
[ label ] BTG f,b[,a]
0
0
a
(f<b>)
None
Bit ‘b’ in data memory location ‘f’ is
inverted. If ‘a’ is ‘0’, the Access Bank will
be selected, overriding the BSR value. If
‘a’ = 1, then the bank will be selected as
per the BSR value (default).
1
1
register ‘f’
BTG
0111
Read
f
b
[0,1]
Q2
0111 0101 [0x75]
0110 0101 [0x65]
255
7
f<b>
PORTC,
bbba
Process
Data
Q3
4
ffff
register ‘f’
Write
Q4
ffff
BOV
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
If Jump:
If No Jump:
Before Instruction
After Instruction
operation
Decode
Decode
No
PC
If Overflow
If Overflow
Q1
Q1
PC
PC
Read literal
Read literal
operation
Branch if Overflow
[ label ] BOV
-128
if Overflow bit is ‘1’
(PC) + 2 + 2n
None
If the Overflow bit is ‘1’, then the
program will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next instruc-
tion, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
1
1(2)
HERE
1110
No
Q2
‘n’
Q2
‘n’
=
=
=
=
=
PIC18FXX8
n
address (HERE)
1;
address (JUMP)
0;
address (HERE + 2)
127
0100
BOV
operation
Process
Process
n
Data
Data
No
PC
Q3
Q3
DS41159D-page 295
JUMP
nnnn
operation
operation
Write to
PC
No
No
Q4
Q4
nnnn